He goes on to explain how a source had been rewatching recorded ISS live stream footage, recorded on Thursday, and came across the inexplicable clip.

Tyler adds: "He says he sees what looks like a fireball of some sort streak in behind ISS.

UFO caught on ISS live stream (Photo: YouTube/secureteam10)

"There is this bright object which cannot be a fireball because there's no air in space, hence there cannot be any fire.

"It comes out of the darkness of space, flies up behind the ISS and we can actually see just before it disappears some red lights shining on the ISS.

"When the ISS finally comes into view of the sun and you can see the Earth beginning to show underneath it and you can see in the exact spot where this object appears there is nothing there."

But some YouTube users were unconvinced, claiming the UFO was in fact a meteor.

One, Neil Conafray, wrote: "Looks like a view from the ISS of the meteorite exploding over Arizona."

While another said: "2 times last year I went to the live feed of the I.S.S. and both times within 15 mins or so... I seen a ship coming into view of the camera one was unbelievable and they cut the feed.﻿"